This proposal uses an innovative methodological framework, the multiphase optimization strategy (MOST), to design an effective and efficient responsive feeding (RF) intervention that promotes child appetite self-regulation among a high-risk sample: families with preschoolers living in rural poverty. The principles of MOST emphasize efficiency, allowing identification of the most efficacious intervention components (i.e., components that contribute to treatment effects) while minimizing participant burden and cost. ONE PATH will intervene on \~760 families across 64 classrooms serving largely low-income, rural populations. ONE PATH will capitalize on the existing infrastructure with the Supplemental Nutrition Assistance Program Education to engage trusted Extension educators making this model cost-effective, and increasing the potential for wide-scale dissemination and sustainability.